"Manuela Schar of Switzerland finished in 1 hour, 28 minutes, 17 seconds — shattering the world best by more than five minutes. Fellow Swiss Marcel Hug took the men's race in 1:18:04, also the fastest time ever.

"The winners' times are considered a world best and not a world record. The straight-line Boston course doesn't qualify for world records because of the possibility of a supportive tailwind like the one on Monday."